"This article is related to a game that has not been released outside Japan. The coverage here may differ from what it would be in an official translation."
|Affiliates||Starfy, Moe, Starly|
|Homeland||Koimaro's Isolated Village|
|Residence||Koimaro's Isolated Village|
|First Appearance||Densetsu no Stafy 4|
Koimaro is a giant Koi fish. He usually has Shurikit in his mouth for unknown reasons.
- He shares a few traits with The Whale and Gabun. All three are very big, they have their name in the stage they appear in, and they have a story role in one game. However, unlike the other two, Starfy and friends never have to go inside Koimaro and Bankirosu doesn't attack him as he does not appear in Densetsu no Stafy 4.